A great addition to our mini engine powered line of rockets. Don't let his low altitude fool you, this is one cool rocket. The Curvilinear features simple and quick construction. When powered by the A10-3T mini engine, heights of 175 feet can be reached. Being short keeps this rocket close to the ground for quick recovery. Recommended Engines: A10-3T Estes model rocketry is recommended for ages 10 and up with adult supervision for those under 12. Unless otherwise specified, all models require assembly. Tools, construction and finishing supplies sold separately. In order to launch, a launch system, model rocket engines, igniters and recovery wadding are required - sold separately-unless otherwise specified.